javascript - 在执行下一行之前等待5秒(Wait 5 seconds before executing next line)

Question

This function below doesn't work like I want it to;(下面的这个功能不像我想要的那样工作;)

being a JS novice I can't figure out why.(作为一个JS新手我无法弄清楚为什么。) I need it to wait 5 seconds before checking whether the newState is -1 .(我需要等待5秒才能检查newState是否为-1 。) Currently, it doesn't wait, it just checks straight away.(目前，它不会等待，它只是立即检查。) function stateChange(newState) { setTimeout('', 5000); if(newState == -1) { alert('VIDEO HAS STOPPED'); } }   ask by copyflake translate from so

Answer 1

You have to put your code in the callback function you supply to setTimeout :(您必须将代码放在您提供给setTimeout的回调函数中：)

function stateChange(newState) { setTimeout(function () { if (newState == -1) { alert('VIDEO HAS STOPPED'); } }, 5000); } Any other code will execute immediately.(任何其他代码将立即执行。)